Denso 295050-0120 (1465A323) Common-Rail Injector – OEM-Grade Replacement For Mitsubishi 4N13/4N14 & PSA HDi Platforms

When field service logs show extended cranking on hot restarts or unstable idle on Mitsubishi ASX, Lancer, or Outlander diesel units, the injector often sits at the root of the complaint. The Denso 295050-0120 – also referenced under OE number 1465A323 and trade code DCRI300120 – is the factory-spec solenoid-actuated injector designed for the 4N13 and 4N14 common-rail engine families. This unit governs fuel metering with precision down to fractions of a millisecond per injection event, directly influencing rail pressure stability, combustion efficiency, and particulate emissions. For workshops and parts suppliers serving Mitsubishi and select PSA vehicles, this injector is not a generic substitute; it is a system-matched component with specific flow calibration tied to its unique QR code, which must be entered into the ECU during installation for proper operation.

This injector operates on the Denso G3 common-rail architecture, a solenoid-controlled design engineered for injection pressures up to 1,800 bar. The internal components – including the control valve, half ball valve seat, and command piston – are machined to micron-level tolerances. A critical feature is the application of DLC (Diamond-Like Coating) on select internal wear surfaces such as the actuating armature and nozzle needle. This coating delivers surface hardness up to five times that of hardened tool steel while reducing friction coefficient by half, providing enhanced resistance to fuel contamination and extending service life in high-mileage operation. The unit is supplied with a QR compensation code – a 20-character alphanumeric string unique to each injector – that stores the injector's measured flow and response-time characteristics for ECU adaptation.

The 295050-0120 injector is cross-referenced to Mitsubishi OE part 1465A323, with additional alternative numbers including 1465A306 and 1465A561 appearing in parts catalogues. Primary engine fitments include the 1.8L 4N13 (85kW or 110kW variants) used in Mitsubishi ASX (2010-onwards), Lancer (2010-onwards), and select Citroën C4 Aircross and Peugeot 4008 models under the 1.8 HDi badge. The injector also supports 2.2L/2.3L 4N14 engines in Mitsubishi Outlander (2010–2012) with outputs up to 177bhp. When sourcing, always verify the exact engine code stamped on the cylinder head and cross-check the OE number physically present on the old unit, as the 1465A-series includes multiple injector variants that are not interchangeable despite similar appearances. For wholesale stock, maintaining inventory by exact Denso reference number (295050-0120) rather than model application alone prevents costly mis-shipment errors.

Replacing this injector demands strict adherence to cleanliness and torque protocols. The injector pocket must be cleared of carbon deposits and the old copper sealing gasket removed before fitting the new unit. The QR code printed on the injector body must be recorded and entered into the ECU using a diagnostic tool, with the correct code assigned to the corresponding cylinder position. Without this injector coding procedure, the ECU continues to drive the injector using the old calibration values, resulting in incorrect injector drive pulse duration, combustion knock at idle, and potential misfire codes. Denso diagnostic tools will flag a mismatch if the ID code is not correctly entered or if a typing error occurs during input. A high-pressure leak test and injection learning procedure should follow installation to confirm sealing integrity and system adaptation.

In the aftermarket repair context, the primary failure modes addressed by replacing the 295050-0120 are internal leakage (excessive return flow) and control-valve wear leading to metering drift. When the valve seat erodes or the command piston loses hydraulic efficiency, rail pressure drops below target, triggering sluggish response, increased soot loading on the DPF, and hot-cranking delays. The DLC coating on the needle and armature enhances tolerance to fuel contaminants, but it does not eliminate wear entirely – approximately 95% of injector failures still originate in the main spindle assembly rather than the coated surfaces. For the commercial workshop, replacing a drifting injector with a new 1465A323 unit restores return-flow symmetry across cylinders, stabilizes rail pressure, and reduces strain on the high-pressure pump. This extends service intervals for the wider fuel system and avoids the higher expense of full pump replacement due to fuel starvation from compromised injectors.

Q1: How do I confirm that 295050-0120 is the correct replacement before ordering for a customer's Mitsubishi?
A: Always match the Denso number stamped on the injector body (295050-0120) alongside the Mitsubishi OE number (1465A323). Verify the engine code – 4N13 or 4N14 – from the vehicle VIN plate. Never rely solely on vehicle model and year, as regional spec variations exist within the ASX and Outlander ranges.

Q2: Can I replace just one injector with a 295050-0120, or must I replace all four?
A: A single injector can be replaced, but you must enter its unique QR code into the ECU for that specific cylinder. However, if the remaining injectors have high mileage, the rail pressure may continue hunting because the pump compensates for their old return-flow levels. For optimal idle stability, replacing paired injectors (e.g., two on a bank) is commercially recommended.

Q3: What is the QR code on the injector, and why is coding mandatory after installation?
A: The QR code is a 20-character alphanumeric identifier that encodes the injector's individual flow characteristics and response time at varying pressures. Coding is mandatory because the ECU uses this data to fine-tune the injection pulse duration for each cylinder. Failure to code results in combustion knock, unstable idle, and potential engine fault codes.

Q4: What are the typical wear points on this injector that justify replacement?
A: The valve seat and the half ball valve assembly are the primary failure points. Erosion of the valve seat sealing face leads to internal leakage and metering drift, which manifests as extended hot cranking and a "hunting" idle. While the DLC coating on the needle and armature improves wear resistance, the main spindle assembly remains the most common source of failure.

Q5: What torque and sealing procedures are required for proper installation?
A: The injector clamp must be tightened using a torque wrench in a multi-step sequence – avoid applying single high torque to prevent distortion of the injector body. The copper sealing washer on the nozzle must be replaced with a new one; reusing the old gasket allows combustion gas blow-by and eventual carbon fouling of the nozzle tips.

Q6: As a wholesale distributor, what MOQ and packaging options are available for bulk stocking?
A: Typical MOQ for B2B replenishment is 6–12 pieces, with neutral or customized packaging available for private-label resale. Stock is generally held for number-based matching (295050-0120 / 1465A323) rather than broad model-family listings, which helps reduce shipping errors.

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